A brief introduction to docker, and how we use it in development. Unfortunately this does not show the demo.

1. February Aarhus DevOps Meetup
Docker in Development

3. Contact Information
Torben B Haagh
Team Lead, Cloud Team
Stibo Systems
E: tobh@stibosystems.com
W:www.stibosystems.dk
L: linkedin.com/in/tbhaagh

4. Docker Job Trends
4

5. 5
Evolution of IT
1995 2015
Running on any
available set of
physical resources
(public/private/
virtualized)
Assembled by
developers using
best available
services
Thin app on
web or mobileThick, client-server
app on thick client
Well-defined stack:
- O/S
- Runtime
- Middleware
Monolithic
Physical
Infrastructure
Source: http://www.slideshare.net/dotCloud/why-docker

6. Challenges
2015
How to ensure services
interact consistently,
avoid dependency hell
Running on any
available set of
physical resources
(public/private/
virtualized)
Assembled by
developers using
best available
services
Thin app on
web or mobile
Source: http://www.slideshare.net/dotCloud/why-docker
How to migrate & scale
quickly, and ensure
compatibility
How to avoid N×M
different configurations

7. 7
Static website
Web frontend
User DB
Queue Analytics DB
Background workers
API endpoint
nginx 1.5 + modsecurity + openssl + bootstrap 2
postgresql + pgv8 + v8
hadoop + hive + thrift + OpenJDK
Ruby + Rails + sass + Unicorn
Redis + redis-sentinel
Python 3.0 + celery + pyredis + libcurl + ffmpeg + libopencv + nodejs
+ phantomjs
Python 2.7 + Flask + pyredis + celery + psycopg + postgresql-client
Development VM
QA server
Public Cloud
Disaster recovery
Contributor’s laptop
Production Servers
Challenges
MultiplicityofStacksMultiplicityof
hardware
environments
Production Cluster
Customer Data Center
Doservicesand
appsinteract
appropriately?
CanImigrate
smoothlyand
quickly?
Source: http://www.slideshare.net/dotCloud/why-docker

8. 8
Results in N×M compatibility nightmare
Static website
Web frontend
Background workers
User DB
Analytics DB
Queue
Development
VM
QA Server
Single Prod
Server
Onsite
Cluster
Public Cloud
Contributor’s
laptop
Customer
Servers
? ? ? ? ? ? ?
? ? ? ? ? ? ?
? ? ? ? ? ? ?
? ? ? ? ? ? ?
? ? ? ? ? ? ?
? ? ? ? ? ? ?
Source: http://www.slideshare.net/dotCloud/why-docker

9. 9
MultiplicityofGoods
Multipilicityof
methodsfor
transporting/storing
DoIworryabout
howgoodsinteract
(e.g.coffeebeans
nexttospices)
CanItransportquickly
andsmoothly
(e.g.fromboattotrain
totruck)
Cargo Transport Pre-1960
Source: http://www.slideshare.net/dotCloud/why-docker

10. 10
? ? ? ? ? ? ?
? ? ? ? ? ? ?
? ? ? ? ? ? ?
? ? ? ? ? ? ?
? ? ? ? ? ? ?
? ? ? ? ? ? ?
Also an N×M Matrix
Source: http://www.slideshare.net/dotCloud/why-docker

11. 11
MultiplicityofGoods
Multiplicityof
methodsfor
transporting/storing
DoIworryabout
howgoodsinteract
(e.g.coffeebeans
nexttospices)
CanItransport
quicklyandsmoothly
(e.g.fromboatto
traintotruck)
Solution: Intermodal Shipping Container
…in between, can be loaded and
unloaded, stacked, transported efficiently
over long distances, and transferred from
one mode of transport to another
A standard container that is loaded
with virtually any goods, and stays
sealed until it reaches final delivery.
Source: http://www.slideshare.net/dotCloud/why-docker

12. 12
Static website Web frontendUser DB Queue Analytics DB
Development
VM
QA server Public Cloud Contributor’s
laptop
Docker is a shipping container system for code
MultiplicityofStacksMultiplicityof
hardware
environments
Production
Cluster
Customer Data
Center
Doservicesand
appsinteract
appropriately?
CanImigrate
smoothlyandquickly
…that can be manipulated using standard
operations and run consistently on virtually
any hardware platform
An engine that enables any payload
to be encapsulated as a lightweight,
portable, self-sufficient container…
Source: http://www.slideshare.net/dotCloud/why-docker

13. App
A
Containers vs. VMs
Host OS
Infrastructure
Guest
OS
Bins/
Libs
App
A’
Bins/
Libs
App
B
Bins/
Libs
AppA’
Docker
Infrastructure
AppA
VM
Container
Containers are isolated,
but share OS and, where
appropriate, bins/libraries
Bins/
Libs
Source: http://www.slideshare.net/dotCloud/why-docker
Guest
OS
Bins/
Libs
Guest
OS
AppB
AppB’
AppB’
AppB’
Host OS
Hypervisor (Type 2)

14. Why the Business Care
“… make your local development and build workflow faster,
more efficient, and more lightweight.”
- James Turnbull, The Docker Book: Containerization is the
new virtualization

15. Why Developers Care
“Docker interests me because it allows simple
environment isolation and repeatability. I can create a
run-time environment once, package it up, then run it
again on any other machine. Furthermore, everything
that runs in that environment is isolated from the
underlying host (much like a virtual machine).
And best of all, everything is fast and simple.”
- Gregory Szorc, Mozilla Foundation
Source: http://www.slideshare.net/dotCloud/why-docker

16. Why Operations Care
With Docker, Developers care about their applications running
inside containers, and Operations cares about managing the
containers.
- James Turnbull, The Docker Book: Containerization is the
new virtualization

17. Local Dev
Docker Machine
Docker Compose
Docker Engine
Source
Atlasssian Cloud
AWS
Bamboo build agent
Docker Hub
Docker Images
Docker Images
Deployment Environments
AWS
Docker Images

18. Docker Image File
21
FROMFROMFROMFROM ewolff////docker-java
ADDADDADDADD application.properties config
ADDADDADDADD leap-base-0.0.1----SNAPSHOT.jar
CMDCMDCMDCMD ////usr////bin////java -jar leap-base-0.0.1----SNAPSHOT.jar
EXPOSEEXPOSEEXPOSEEXPOSE 8080
Docker Hub

19. Demo

20. Questions & Comments

21. References
http://www.slideshare.net/dotCloud/why-docker
https://www.docker.com/products/docker-toolbox
https://github.com/deviantony/docker-elk
https://github.com/google/cadvisor